Development time (days, mean ± SE) of nymphs in the different instars of H. foeniculi at five constant temperatures (15°C, 20°C, 25°C, 28°C or 30°C), a photophase of 12 h and a relative humidity of 70±10%.

1Within the rows, the means with the same lowercase letter do not differ significantly by the Student-Newman-Keuls test (P = 0.05).2Within the columns, the means with uppercase letters do not differ significantly by the Student-Newman-Keuls test (P = 0.05).3Represents the entire time that an aphid spent in the nymphal stage.